108435993 has 4 divisors (see below), whose sum is σ = 144581328. Its totient is φ = 72290660.

The previous prime is 108435991. The next prime is 108435997. The reversal of 108435993 is 399534801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 108435993 - 2¹ = 108435991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108435991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18072663 + ... + 18072668.

It is an arithmetic number, because the mean of its divisors is an integer number (36145332).

Almost surely, 2^108435993 is an apocalyptic number.

It is an amenable number.

108435993 is a deficient number, since it is larger than the sum of its proper divisors (36145335).

108435993 is an equidigital number, since it uses as much as digits as its factorization.

108435993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36145334.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 108435993 is about 10413.2604404192. The cubic root of 108435993 is about 476.8602845777.

It can be divided in two parts, 10843 and 5993, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 108435993 in words is "one hundred eight million, four hundred thirty-five thousand, nine hundred ninety-three".